Question

Color is what kind of data? A ratio or a nominal data?

Answer 1

I think it is ratio, since it can be measured through wavelengths.

Answer 2

As best I remember, color is a nominal attribute. Did you check your text?

Answer 3

Nominal Data
A set of data is said to be nominal if the values / observations belonging to it can be assigned a code in the form of a number where the numbers are simply labels. You can count but not order or measure nominal data. For example, in a data set males could be coded as 0, females as 1; marital status of an individual could be coded as Y if married, N if single.

This is from: http://www.stats.gla.ac.uk/steps/glossary/presenting_data.html#nomdat

Answer 4

My high school teachers taught me it is nominal. But according to my understanding in physics, color can be measured through wavelengths. Does this describe the nominal data's definition?

Answer 5

You'll need to take up that issue with your former teachers.

Answer 6

in physics when u talk about wavelenghts, it is a ratio
when u take a survey of favorite color, it is nominal

Answer 7

in physics all colors are sorted based on wavelenghts, clearly its a ratio.

but when u take a survey of fav color, you dont bother about wavelengths, order doesnt matter. u just randomly take the score

Answer 8

So, do you mean in stats, it's a nominal data?

Answer 9

yes for sure, color is nominal data

Notice that taking mean and processing the wavelength/frequency values makes good sense when u are talking about physics experiments

but taking mean of wavelengths in statistics survey makes no sense

Answer 10

Okay. Thank you. :))

Answer 11

np :)

think extreme :- take mean of color of 100 ppl who participated in survey ? wat wud u do, u wanto take mean of wavelenghts ? wat wud u do wid that mean ? its not USEFUL
instead, we treat color as nominal, and construct a frequency table... and work on it in stats

Answer 12

Yes yes yes. I believe in you. :)

Answer 13

say, two ppl participated in color survey, their fav colors are : Violet, Red

if u take mean of wavelengths, u wud get Green. how useful is that ?

instead, in stats, when dealing wid nominal data like this we can simply say that 50% like Violet, 50% like Red. which is more meaningful

Answer 14

Just wanted to make sure u see wat i mean lol

Answer 15

HAHAHAHA. Don't worry, I already understood it since your 1st reply. :D

Answer 16

cool/ :)